Method for producing citric acid
Process for the manufacture of citric acid, characterized in that at least part of the carbohydrate raw material consists of a wheat starch B hydrolysate.
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Claims
1. A process for the manufacture of citric acid, said process comprising treating a carbohydrate raw material under conditions effective to produce citric acid and recovering said citric acid, whereby at least 25% of the carbohydrate raw material employed consists of a wheat starch B hydrolysate wherein the carbohydrate fraction of the wheat B hydrolysate contains at least 85% glucose.
2. The process according to claim 1, whereby the wheat B hydrolysate represents at least 50% of the carbohydrate raw material employed.
3. The process according to claim 1, whereby the wheat B hydrolysate represents at least 75% of the carbohydrate raw material employed.
4. An industrial product for use in manufacturing citric acid consisting of a wheat starch B hydrolysate in which the carbohydrate fraction therein contains at least 85% glucose, said hydrolysate having undergone treatment on a cation exchange resin, and which contains less than 500 ppb of iron and less than 20 ppb of manganese.
5. The industrial product according to claim 4, wherein the carbohydrate fraction of the wheat B hydrolysate contains at least 90% glucose.
6. The industrial product according to claim 4, wherein the carbohydrate fraction of the wheat B hydrolysate contains at least 92% glucose.
| 2492673 | December 1949 | Woodward et al. |
| 2970084 | January 1961 | Schweiger et al. |
| 3285831 | November 1966 | Swarthout et al. |
| 4165240 | August 21, 1979 | Enokizono et al. |
| 0 136 087 | April 1985 | EPX |
- J. App. Microbio, 1953, 1, 7-13 (Andrew J. Moyer). "Starch : Chemistry and Technology" Second edition by Roy L. Whistler, pp. 491-506. "Starch Production Technology" Radley J.A. (1976) pp. 175-187. Prehrambeno-Tehnoloska Biotehnoloska Revija, 1994 32(1) 17-20. "Food Acid Manufacture, Recent Developments" by A.A. Lawrence, published by Noyes Data Corp., 1974 edition pp. 2 to 74. "Biotechnology, A Comprehensive Treatise in 8 volumes"by H.J. Rehm and G. Reed, vol. 3, Chapter 3d. Brochures of Vogelbusch Ges. m.b.H., Austria : "Influence of Nutrient Concentration in the Fermentation Media on Production of Citric Acid By Industrially Used Strains of Aspergillus Niger".
Type: Grant
Filed: May 21, 1996
Date of Patent: Jul 27, 1999
Assignee: Roquette Freres (Lestrem)
Inventor: Marie-Helene Saniez (Saint Andre)
Primary Examiner: Leon B. Lankford, Jr.
Assistant Examiner: Christopher R. Tate
Law Firm: Henderson & Sturm
Application Number: 8/646,267
International Classification: C12P 148; C07C 59265;
